diff --git a/tests/requirements.txt b/tests/requirements.txt
index de597fc4..d910638e 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -1,5 +1,5 @@
 flake8
+paho-mqtt<2
 pytest
 pywis-pubsub
-requests
-paho-mqtt<2
\ No newline at end of file
+requests
\ No newline at end of file
diff --git a/wis2box-management/Dockerfile b/wis2box-management/Dockerfile
index 10d77bb8..4776c56f 100644
--- a/wis2box-management/Dockerfile
+++ b/wis2box-management/Dockerfile
@@ -41,7 +41,7 @@ RUN apt-get update -y && apt-get install -y ${DEBIAN_PACKAGES} \
     https://github.com/geopython/pygeometa/archive/refs/tags/0.16.0.zip \
     https://github.com/wmo-im/pywis-topics/archive/refs/tags/0.2.0.zip \
     # install cap validator
-    && pip3 install --no-cache-dir capvalidator>=0.1.0-dev2 \
+    && pip3 install --no-cache-dir capvalidator>=0.1.0-dev4 \
     # install shapely
     && pip3 install --no-cache-dir cython pygeos==0.13 \
     && pip3 install shapely \
diff --git a/wis2box-management/requirements.txt b/wis2box-management/requirements.txt
index fe9dc4fd..ef1c7b4a 100644
--- a/wis2box-management/requirements.txt
+++ b/wis2box-management/requirements.txt
@@ -9,4 +9,4 @@ pywis-pubsub
 pywis-topics
 PyYAML
 requests
-capvalidator>=0.1.0-dev3
\ No newline at end of file
+capvalidator>=0.1.0-dev4
\ No newline at end of file
diff --git a/wis2box-management/wis2box/data/cap_message.py b/wis2box-management/wis2box/data/cap_message.py
index 784049b6..f660467a 100644
--- a/wis2box-management/wis2box/data/cap_message.py
+++ b/wis2box-management/wis2box/data/cap_message.py
@@ -26,7 +26,7 @@
 from typing import Union
 
 from wis2box.data.base import BaseAbstractData
-from capvalidator import validate_xml, get_dates
+from capvalidator import validate_cap_message, get_dates
 
 LOGGER = logging.getLogger(__name__)
 
@@ -75,7 +75,7 @@ def transform(self, input_data: Union[Path, bytes],
         _meta['relative_filepath'] = self.get_local_filepath(_meta['data_date'])  # noqa
 
         # validate the CAP XML string content using the capvalidator package
-        result = validate_xml(input_bytes, strict=False)
+        result = validate_cap_message(input_bytes, strict=False)
         if not result.passed:
             LOGGER.error(
                 f'Invalid CAP XML, not publishing. Reason: {result.message}')